KR20020087179A - Condenser in one form with oil separator - Google Patents

Abstract

PURPOSE: A condenser integrated with oil separator is provided to prevent oil mixed in refrigerant discharged from a compressor from flowing into the condenser. CONSTITUTION: A condenser has an oil separation device vertically installed parallel to a first header pipe(10) or a second header pipe(50) to separate oil in refrigerant and return to a compressor and includes an oil separating plate(40) vertically installed parallel to the first header pipe or the second header pipe and having an inside partitioned into an oil separating chamber(20) and a refrigerant circulation chamber(30) and a plurality of refrigerant passing holes formed thereon; a ball valve(90) opening and closing an oil outlet formed on a bottom of the oil separating chamber; and an oil returning passage(80) connecting the oil outlet and a crank chamber of the compressor to guide oil collected in the oil separating chamber to the crank chamber of the compressor.

Description

Oil Separator Integrated Condenser {CONDENSER IN ONE FORM WITH OIL SEPARATOR}

The present invention relates to a condenser, and more particularly, to an oil separator integrated condenser in which oil discharged from a compressor and flowed together with the refrigerant is separated from the refrigerant to prevent oil from entering the condenser.

An automotive air conditioner includes a compressor for compressing a low-temperature low-pressure gas refrigerant into a high-temperature high-pressure gas refrigerant, a condenser for making the high-temperature, high-pressure gas refrigerant discharged from the compressor into a liquid state by heat exchange, and liquefying from the condenser. And an evaporator for making the refrigerant conveyed into a low pressure liquid state, and an evaporator for evaporating the refrigerant conveyed from the expansion valve by heat exchange to make it a gaseous state.

In addition, the compressor constituting the cooling device selectively receives the power of the engine through the pulley of the vehicle by the intermittent action of the electronic clutch, sucks and compresses the heat exchanged refrigerant exiting the evaporator and discharges it to the condenser.

A swash plate compressor, which is a representative form of a piston compressor, includes a front housing, a rear housing coupled thereto, a front cylinder installed inside the front housing, a rear cylinder installed on the rear housing, bores of the front cylinder, A plurality of double head pistons installed in the bore of the rear cylinder so as to be capable of linear reciprocation, a drive shaft rotatably installed through the center of the front and rear housings and the front and rear cylinders, and inclined to be inclined to the drive shaft and rotated according to the rotation of the drive shaft. Thereby, it comprises a swash plate for advancing the piston forward and backward, and both valve units provided between the front and rear cylinders and the inner surface of the front and rear housings. In addition to the above-mentioned double head piston method, the swash plate type compressor also has a double head piston method.

When the power of the engine is transmitted to the drive shaft of the compressor configured as described above, the pistons move forward and backward by the swash plate rotating in an inclined state together with the drive shaft, and the refrigerant flows through the valve unit during the suction stroke of the piston. It is sucked into the cylinder bore, and during the discharge stroke of the piston, the refrigerant is compressed and discharged through the valve unit.

In addition, the oil is contained in the refrigerant so that the compressor operates smoothly, so that the oil circulates each part of the system together with the refrigerant during the operation of the system. Thus, the oil circulating in the system is lubricated by the compressor.

However, when oil enters a heat exchanger such as a condenser, an expansion device, pipes and hoses, the oil is coated on the inner surface of the heat exchanger to reduce heat exchange efficiency, and occupies a predetermined space of the heat exchanger, thereby decreasing heat transfer rate. In addition, since the pressure drop amount of the refrigerant is increased, it adversely affects the driving load of the system.

In addition, when the lubricating oil circulates through the entire cooling system, the amount of oil supplied to the compressor is fluctuated so that the lubricating oil is not sufficiently supplied to each driving part of the compressor, so that the lubrication of the compressor is not stable and smooth. Accordingly, the durability of the compressor is degraded, such as dry operation, driving parts are burned out, or lock is generated.

In addition, when a large amount of lubricating oil is used to sufficiently supply the lubricating oil to the drive part of the compressor, the lubricating oil loses its inherent function of the refrigerant, and the efficiency of the cooling system is lowered. Increased, adversely affecting the mounting and layout of the engine compartment.

In consideration of the above problems, an oil separator which separates and recovers lubricating oil from a refrigerant compressed and discharged from a compressor and is returned to a compressor is generally used in a cooling system. The oil separator is generally provided at the discharge line of the compressor. do.

That is, the oil discharged together with the refrigerant after lubricating the driving unit of the compressor is separated from the refrigerant through the oil separator and returned to the compressor without being introduced into the condenser.

However, the oil separation action according to the oil separator according to the prior art is closely related to the conditions such as the temperature inside the oil separator, the pressure difference between the crankcase of the compressor and the oil separator, and the oil separation action is a minute change of these conditions. As it reacts sensitively, the oil separation efficiency is lowered, so some oil is not separated from the refrigerant and flows into the condenser after the compressor with the refrigerant.

On the other hand, since the refrigeration cycle (expansion valve, evaporator, etc.) after the condenser is generally not provided with a separate oil separation means, as described above, when the oil flowing into the condenser is left as it is, the oil is expanded valve and As it passes through the evaporator, it is coated on the inner surface of the heat exchanger to reduce the heat exchange efficiency, and as a result, a sufficient amount of oil is not supplied to the compressor, and the compressor is not lubricated smoothly. The durability of the compressor is deteriorated, such as driving parts being burned out or lock is generated.

The present invention has been invented to solve the above problems, and an object of the present invention is to provide an oil separator integrated condenser that separates oil mixed in the refrigerant discharged from the compressor and does not flow into the condenser.

1 is a block diagram of a condenser according to the present invention.

Figure 2 is a perspective view of an oil separator applied to the condenser according to the present invention.

3 is an enlarged view of a portion A of FIG. 1;

4 is a cross-sectional view taken along the line IV-IV of FIG. 3.

5, 6, and 7 are schematic views showing the flow of refrigerant and oil in the condenser according to the present invention.

<Description of the symbols for the main parts of the drawings>

10,50: header pipe 11: refrigerant inlet pipe

12,52: baffle 20: oil separation chamber

21: cap 22: filter

30: refrigerant circulation chamber 40: oil separation plate

41: refrigerant passing hole 42: incision

80: oil return path 90: ball valve

An oil separator integrated condenser according to the present invention for achieving the above object includes a first header to which a refrigerant inlet or a refrigerant outlet is connected; A second header erected in parallel with the first header and connected with a refrigerant outlet or a refrigerant inlet; A plurality of tubes disposed between the first header and the second header to form a fluid passage therebetween; And, in the condenser comprising a plurality of cooling fins disposed between each tube,

The condenser is installed in parallel with the first or second header, characterized in that the oil separation means for separating the oil in the refrigerant to return to the compressor side.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Example 1>

1 is a block diagram of an oil separator integrated condenser according to the present invention, Figure 2 is a perspective view of an oil separator plate applied to the condenser according to the present invention, Figure 3 is a valve means applied to the condenser according to the present invention of Figure 1 A part enlarged view, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3, and FIG. 5 is a schematic diagram showing the flow of refrigerant and oil in the condenser according to the present invention.

As shown in FIG. 1, the oil separator integrated condenser according to the present invention has a refrigerant inlet pipe 11 connected thereto and divides an inner space into two left and right positions of the oil separation chamber 20 and the refrigerant circulation chamber 30. The first header pipe 10 in which the oil separation plate 40 stands vertically, the second header pipe 50 in which the oil separation plate 40 stands vertically in parallel to the first header pipe 10, and the refrigerant discharge pipe 51 is connected thereto, A plurality of tubes 60 arranged horizontally between the first header pipe 10 and the second header pipe 50 to form a fluid passage therebetween, and a plurality of horizontally disposed between the respective tubes 60. Cooling fins 70 are provided.

As a configuration example of the condenser refrigerant path to which oil separation according to the present invention is applied, for example, as shown in FIG. 5, the first header pipe 10 has two spaces S1 from the top to the inside of the refrigerant circulation chamber 30. The second header pipe 50 includes a baffle 52 that divides the internal space into two spaces S3 and S4 from top to bottom.

The two baffles 12, 52 are arranged in a zigzag manner so that the tubes 60 form three fluid passages P1, P2, P3 from top to bottom between both header pipes 10, 50. .

Then, the oil separation plate 40 corresponding to the first space S1 of the refrigerant circulation chamber 30 penetrates to the left and right to open the oil separation chamber 20 and the first space S3 of the refrigerant circulation chamber 30. A plurality of refrigerant passage holes 41 are in fluid communication. The refrigerant passage hole 41 is formed by cutting the oil separation plate 40 in three longitudinal directions in the vertical direction, and bending the cutout portion 42 at an angle inclined toward the refrigerant inlet pipe 11.

As shown in FIG. 3, the bottom of the oil separation chamber 20 connects an oil separation chamber 20 and a crank chamber (not shown) to guide oil collected in the oil separation chamber 20 to be returned to the crank chamber. The oil return path 80 is connected. In addition, the lower portion of the oil separation chamber 20, the lower opening of the oil separation chamber 20, the cap 21 is provided with an oil outlet 21a for connecting the oil return path 80, such as brazing Are combined.

When a certain amount of oil is collected in the oil separation chamber 20, a ball valve 90 is installed to open the oil outlet 21 a of the cap 21 so that the oil is naturally returned to the crank chamber. That is, the ball valve 90 closes the oil outlet 21a by its own weight and opens the oil outlet 21a while floating according to the amount of oil collected therein.

In addition, a filter 22 for filtering the collected oil may be installed at the bottom of the oil separation chamber 20.

And, as shown in Figure 4, the first header pipe 10 is made of a dumbbell shape consisting of a circular oil separation chamber 20 and the refrigerant circulation chamber 30, the oil separation plate 40 therebetween. Can be combined.

Referring to the operation state of the oil separator integrated condenser according to the present invention configured as described above are as follows.

The refrigerant compressed by the high temperature and high pressure in the compressor flows into the oil separation chamber 20 through the refrigerant inlet pipe 11 in a state where oil is mixed, impinges the oil separation plate 40, and then opens the inside of the oil separation chamber 20. While flowing, it flows into the first space S1 of the refrigerant circulation chamber 30 through the refrigerant passage hole 41 between the front surface of the oil separation plate 40 and the cutout 42.

The refrigerant introduced into the first space (S1) flows to the first space (S3) side of the second header pipe (50) along the first fluid passage (P1) and exchanges heat with air passing through the first fluid passage (P1). do.

The refrigerant flowing into the first space S3 of the second header pipe 50 flows along the second fluid passage P2 by the baffle 52 toward the second space S2 of the first header pipe 10. Then, the U-turn toward the third fluid passage (P3) flows along the third fluid passage (P3) and is discharged through the refrigerant discharge pipe (51).

Meanwhile, at the time when the refrigerant introduced through the refrigerant inlet pipe 11 passes through the oil separation plate 40, the gaseous refrigerant may pass through the refrigerant passage hole 41 by turning the cutout 42 as described above. However, the oil is buried by the viscosity on the front of the oil separation plate 40 and the front of the cutout 42.

The oil buried in the oil separation plate 40 drops downward by gravity and is collected at the bottom of the oil separation chamber 20.

When the amount of oil collected in the oil separation chamber 20 increases, as shown in FIG. 3, the ball valve 90 floats in the oil to open the oil outlet 21a, and the collected oil is filtered in the filter 22. It is discharged to the oil return path 80 through the oil outlet (21a) in the foreign matter is removed through the.

At this time, since the refrigerant introduced into the oil separation chamber 20 is a gas phase and the oil is a liquid phase, the oil introduced into the oil separation chamber 20 is collected at the bottom of the oil separation chamber 20, and the refrigerant is an oil separation chamber ( It does not leak through the oil return path 80 because it flows into the condenser through the top of 20).

6 and 7 are embodiments for showing that the oil separator according to the present invention can be applied to all kinds of condensers without being restricted by the refrigerant path of the condenser.

<Example 2>

6 is provided with a refrigerant inlet pipe 11 and a refrigerant discharge pipe 13 in one header pipe 10, and one baffle 14 is formed inside the header pipe 10 so that the refrigerant tubes 60 are U. FIG. It shows a condenser forming a fluid passage.

An oil separation chamber 20 is formed on the refrigerant inlet pipe 11 side of the header pipe 10 so as not to interfere with the refrigerant discharge pipe 13, and oil separation is performed between the oil separation chamber 20 and the refrigerant circulation chamber 30. The plate 40 is erected.

<Example 3>

7 is a block diagram showing that the oil separation plate 40 according to the present invention is applied to a condenser in which a baffle is not employed.

The condenser has a coolant inlet pipe 11 and a coolant discharge pipe 51 formed in each of the header pipes 10 and 50, and no refrigerant baffles are formed in the header pipe 10. These form a fluid passage, and the oil separation plate 40 is formed inside the header pipe 10 on the refrigerant inlet pipe 11 side.

Therefore, the oil which is discharged together with the refrigerant from the compressor and is not removed through the oil separator after the compressor and is introduced into the condenser together with the refrigerant is removed from the refrigerant while passing through the oil separation plate 40 before being introduced into the condenser. Only this unmixed pure refrigerant flows in.

As described above, according to the oil separator integrated condenser according to the present invention, the oil mixed with the refrigerant is separated from the refrigerant before entering the condenser, and the oil is not mixed in the expansion valve, the evaporator, and the like after the condenser. Since only the refrigerant flows in, heat exchange efficiency can be improved.

In addition, since the oil does not leak to the heat exchanger other than the compressor, an appropriate amount of oil is supplied to the compressor, thereby improving durability of the driving unit of the compressor.

Claims (6)

A first header to which a coolant inlet or a coolant outlet is connected; A second header erected in parallel with the first header and connected with a refrigerant outlet or a refrigerant inlet; A plurality of tubes disposed between the first header and the second header to form a fluid passage therebetween; And, in the condenser comprising a plurality of cooling fins disposed between each tube, The condenser is installed in parallel with the first or second header, oil separation unit integrated condenser characterized in that the oil separation means for separating the oil in the refrigerant to return to the compressor side. According to claim 1, wherein the oil separating means, An oil separator installed in parallel with the first or second header to divide the interior into an oil separation chamber and a refrigerant circulation chamber, and having a plurality of refrigerant passage holes formed therein; Valve means for opening and closing an oil outlet formed at a bottom of the oil separation chamber partitioned by the oil separation plate; And, An oil separator integrated condenser comprising an oil return path connecting the oil outlet formed at the bottom of the oil separation chamber to the crank chamber of the compressor to guide the oil collected in the oil separation chamber to be returned to the crank chamber of the compressor. . The method of claim 2, wherein the oil separation plate, An oil separator integrated condenser comprising three blades cut in three directions in a vertical direction and bent toward a refrigerant inlet to form a refrigerant passage hole of the oil separator. The method of claim 2, wherein the valve means, An oil valve which closes the oil outlet of the bottom of the first header by its own weight and floats in oil according to the amount of oil collected in the first header to open the oil outlet of the first header; Separator integrated condenser. The method of claim 1, wherein the first header, An oil separator integrated condenser, comprising a filtration member installed at the oil outlet side of the first header to remove foreign substances mixed in oil. The oil separator integrated condenser of claim 1, wherein the oil separating means is formed integrally with one header.